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Diffstat (limited to 'sound/drivers/opl3/opl3_seq.c')
-rw-r--r--sound/drivers/opl3/opl3_seq.c279
1 files changed, 279 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_seq.c b/sound/drivers/opl3/opl3_seq.c
new file mode 100644
index 0000000000..75de1299c3
--- /dev/null
+++ b/sound/drivers/opl3/opl3_seq.c
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
+ *
+ * Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
+ *
+ * OPL2/3 FM instrument loader:
+ * alsa-tools/seq/sbiload/
+ */
+
+#include "opl3_voice.h"
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
+
+bool use_internal_drums = 0;
+module_param(use_internal_drums, bool, 0444);
+MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
+
+int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
+{
+ if (!try_module_get(opl3->card->module))
+ return -EFAULT;
+ return 0;
+
+}
+
+void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
+{
+ module_put(opl3->card->module);
+}
+
+int snd_opl3_synth_setup(struct snd_opl3 * opl3)
+{
+ int idx;
+ struct snd_hwdep *hwdep = opl3->hwdep;
+
+ mutex_lock(&hwdep->open_mutex);
+ if (hwdep->used) {
+ mutex_unlock(&hwdep->open_mutex);
+ return -EBUSY;
+ }
+ hwdep->used++;
+ mutex_unlock(&hwdep->open_mutex);
+
+ snd_opl3_reset(opl3);
+
+ for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
+ opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
+ opl3->voices[idx].time = 0;
+ opl3->voices[idx].keyon_reg = 0x00;
+ }
+ opl3->use_time = 0;
+ opl3->connection_reg = 0x00;
+ if (opl3->hardware >= OPL3_HW_OPL3) {
+ /* Clear 4-op connections */
+ opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
+ opl3->connection_reg);
+ opl3->max_voices = MAX_OPL3_VOICES;
+ }
+ return 0;
+}
+
+void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
+{
+ unsigned long flags;
+ struct snd_hwdep *hwdep;
+
+ /* Stop system timer */
+ spin_lock_irqsave(&opl3->sys_timer_lock, flags);
+ if (opl3->sys_timer_status) {
+ del_timer(&opl3->tlist);
+ opl3->sys_timer_status = 0;
+ }
+ spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
+
+ snd_opl3_reset(opl3);
+ hwdep = opl3->hwdep;
+ mutex_lock(&hwdep->open_mutex);
+ hwdep->used--;
+ mutex_unlock(&hwdep->open_mutex);
+ wake_up(&hwdep->open_wait);
+}
+
+static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
+{
+ struct snd_opl3 *opl3 = private_data;
+ int err;
+
+ err = snd_opl3_synth_setup(opl3);
+ if (err < 0)
+ return err;
+
+ if (use_internal_drums) {
+ /* Percussion mode */
+ opl3->voices[6].state = opl3->voices[7].state =
+ opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
+ snd_opl3_load_drums(opl3);
+ opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
+ opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
+ } else {
+ opl3->drum_reg = 0x00;
+ }
+
+ if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
+ err = snd_opl3_synth_use_inc(opl3);
+ if (err < 0)
+ return err;
+ }
+ opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
+ return 0;
+}
+
+static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
+{
+ struct snd_opl3 *opl3 = private_data;
+
+ snd_opl3_synth_cleanup(opl3);
+
+ if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
+ snd_opl3_synth_use_dec(opl3);
+ return 0;
+}
+
+/*
+ * MIDI emulation operators
+ */
+const struct snd_midi_op opl3_ops = {
+ .note_on = snd_opl3_note_on,
+ .note_off = snd_opl3_note_off,
+ .key_press = snd_opl3_key_press,
+ .note_terminate = snd_opl3_terminate_note,
+ .control = snd_opl3_control,
+ .nrpn = snd_opl3_nrpn,
+ .sysex = snd_opl3_sysex,
+};
+
+static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
+ void *private_data, int atomic, int hop)
+{
+ struct snd_opl3 *opl3 = private_data;
+
+ snd_midi_process_event(&opl3_ops, ev, opl3->chset);
+ return 0;
+}
+
+/* ------------------------------ */
+
+static void snd_opl3_synth_free_port(void *private_data)
+{
+ struct snd_opl3 *opl3 = private_data;
+
+ snd_midi_channel_free_set(opl3->chset);
+}
+
+static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
+{
+ struct snd_seq_port_callback callbacks;
+ char name[32];
+ int voices, opl_ver;
+
+ voices = (opl3->hardware < OPL3_HW_OPL3) ?
+ MAX_OPL2_VOICES : MAX_OPL3_VOICES;
+ opl3->chset = snd_midi_channel_alloc_set(16);
+ if (opl3->chset == NULL)
+ return -ENOMEM;
+ opl3->chset->private_data = opl3;
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.owner = THIS_MODULE;
+ callbacks.use = snd_opl3_synth_use;
+ callbacks.unuse = snd_opl3_synth_unuse;
+ callbacks.event_input = snd_opl3_synth_event_input;
+ callbacks.private_free = snd_opl3_synth_free_port;
+ callbacks.private_data = opl3;
+
+ opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
+ sprintf(name, "OPL%i FM Port", opl_ver);
+
+ opl3->chset->client = opl3->seq_client;
+ opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
+ SNDRV_SEQ_PORT_CAP_WRITE |
+ SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
+ SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
+ SNDRV_SEQ_PORT_TYPE_MIDI_GM |
+ SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
+ SNDRV_SEQ_PORT_TYPE_HARDWARE |
+ SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
+ 16, voices,
+ name);
+ if (opl3->chset->port < 0) {
+ int port;
+ port = opl3->chset->port;
+ snd_midi_channel_free_set(opl3->chset);
+ return port;
+ }
+ return 0;
+}
+
+/* ------------------------------ */
+
+static int snd_opl3_seq_probe(struct device *_dev)
+{
+ struct snd_seq_device *dev = to_seq_dev(_dev);
+ struct snd_opl3 *opl3;
+ int client, err;
+ char name[32];
+ int opl_ver;
+
+ opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
+ if (opl3 == NULL)
+ return -EINVAL;
+
+ spin_lock_init(&opl3->voice_lock);
+
+ opl3->seq_client = -1;
+
+ /* allocate new client */
+ opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
+ sprintf(name, "OPL%i FM synth", opl_ver);
+ client = opl3->seq_client =
+ snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
+ name);
+ if (client < 0)
+ return client;
+
+ err = snd_opl3_synth_create_port(opl3);
+ if (err < 0) {
+ snd_seq_delete_kernel_client(client);
+ opl3->seq_client = -1;
+ return err;
+ }
+
+ /* setup system timer */
+ timer_setup(&opl3->tlist, snd_opl3_timer_func, 0);
+ spin_lock_init(&opl3->sys_timer_lock);
+ opl3->sys_timer_status = 0;
+
+#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
+ snd_opl3_init_seq_oss(opl3, name);
+#endif
+ return 0;
+}
+
+static int snd_opl3_seq_remove(struct device *_dev)
+{
+ struct snd_seq_device *dev = to_seq_dev(_dev);
+ struct snd_opl3 *opl3;
+
+ opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
+ if (opl3 == NULL)
+ return -EINVAL;
+
+#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
+ snd_opl3_free_seq_oss(opl3);
+#endif
+ if (opl3->seq_client >= 0) {
+ snd_seq_delete_kernel_client(opl3->seq_client);
+ opl3->seq_client = -1;
+ }
+ return 0;
+}
+
+static struct snd_seq_driver opl3_seq_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .probe = snd_opl3_seq_probe,
+ .remove = snd_opl3_seq_remove,
+ },
+ .id = SNDRV_SEQ_DEV_ID_OPL3,
+ .argsize = sizeof(struct snd_opl3 *),
+};
+
+module_snd_seq_driver(opl3_seq_driver);